Stain composition



@FFHCSEO ALEXANDER MURRAY, or MARI'ETTA', onto, Assienon To THE MARI'ETTA PAINT a colon COMPANY, or MARIETTA, 01110, A CORPORATION or OHIO.

STAIN COMPOSITION.

No Drawing.

To all whom it may concern:

Be it known that I, ALEXANDER MURRAY, a citizen of Great Britain, residing at Marietta, in the county of Washington and State of Ohio, have invented certain new and useful Improvements in Stain Compositions,

and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present inventon relates to wood stains, and comprises a wood stain having water as a minor constituent of the vehicle, which stain will be free from the objections commonly inherent in wood stains of an aqueous nature heretofore proposed.

It is common in the art of staining wood, for example furniture, to place the wooden articles, for example chairs on a suitable cradle and lower them into a bath ofstain. This method is open to objections when the stain is made up with an aqueous liquid, since the water vehicle softens the glue to some extent, after staining, the furniture is liable to fall to pieces during the drying, or subsequent operations. Furthermore, water as the vehicle is open to the objection that it raises the grain of the wood, or in other words, it causes a certain amount of roughness of the finished article. Also it is open toobjection in cases where veneered furniture is being treated, since the thin coating of wood forming the veneer is sometimes caused to separate from the base, either at the edges or at points remote from the edges.

It is difficult to remove blisters produced in this latter case, whereas when the veneer separates from: the base around the edges, it

is difficult to again glue the veneer at the-- edges, to the base.

In accordance with the present invention, the above objections are overcome by the employment of a vehicle which, while containing Water,'contains another liquid which is not normally miscible in all proportions with water, and also by the employment in some cases of liquids which are miscible with water, but whichdonot form solvents for the dyestuff or some one or more of. the other ingredients of the stain. The dyestuffs which are used are those which are fast to light, and preferably those which are soluble in alkali solutions containing a protective colloid. In order to more fully illus Specification of Letters Patent.

Patented July llll, 11922.

Application filed, July 13, 1920. Serial No. 395,924.

trate the invention, the following example is given, it being understood that the invention is not restricted to the details thereof.

100 grains of an acid dyestuff are warmed up with fluid ounce of potassium hydroxid solution (for example about 30%) until the dye is completely dissolved, then 2 ounces of the fatty acids produced from linseed oil are added and the mixture well 'stirred. The solution is then diluted with water soluble dye, (0) one or more nonaqueous liquids in which water is normally insoluble or nearly so, and (d) a solating agent in the nature of a protective colloid. Other liquids, such as alcohols, phenols, or ketones such as acetone and the like, which are miscible with water, may also be present in the same system. The acid dyestuff may vary and for the purpose of staining wooden furniture, an acid dyestuff capable of giving a mahogany color or the color of some other expensive wood may be conveniently employed. The water-soluble acid dyes have the advantage of being, generally speaking, fast to light, and the further advantage that they are not easily removed by washing. The treated furniture can also be filled directly over with a paste filler containing benzine and turpentine without dissolving the color. y

In place of'the potass um soap derived from linseed oil fatty acids, other soaps can be employed, derived from any of the ordinary fatty acids, or from resin acids, or ordinary rosin, and also other protective colloids capable of stabilizing such emulsions or solutions can be employed. Various mixtures of organic liquids can be employed. for example acetone, and benzol, alcohol and amyl acetate, or any other non-aqueous liquid .which will mix with the dyestuff solution to form a stable emulsion or colloidal solution. According to this invention, it is possible to prepare mixtures which are apparently homogeneous and which are clear by transmitted light and which -can be kept indefinitely without showing any signs. of separation of any of the constitutents. These solutions usually show a strong Tyndall cone.

The stain may also be madeup by dissolv ing it dry in water and then adding the other ingredients in any convenient order, or by mixing the non-aqueous constituents and adding the aqueous dye solutions to the mixture.

The stains produced in accordance with. the present invention are free from the objections above referred to, and while they are particularly suitable for staining wood, they can also be used for staining other materials instead of wood, if desired.

a The term soap as used in the appended claims is intended to include resinates.

I claim:

1. A stain comprising a ter-soluble fast dyestufl, containing a soap of a fatty acid, Water, and an organic liquid which is not miscible in all proportions -with water, such organic liquid being one that is incapable of. destroying either the soap or the said dyestuff, and which does not readily dissolve dried glue.

2. A stain comprising a solution of a wasolution of a Wadyestuff, a soapy material, a small amount of ter-soluble fast dyestufi', containing a soap, a small amount of water, an alcohol which is soluble in water, and an organic liquid which is not miscible in all proportions with water,

ing either the soap or the acid dyestuff, and

which does not readily dissolve d-ried glue.

4. A stain comprising a solution of a dyestufl", a projective colliod, water, and a plurality of organic liquids, at least one of which is readily water-soluble, and at least one other of which is not, such organic liquids being incapable of destroying either the soap or the said dyestufi' and incapable of readily dissolving dried glue.

5. A stain comprising a solution of an acid water, ethyl alcohol, butyl alcohol, acetone and toluene, in such proportions as to form a thin-flowing liquid.

In testimony whereof I have hereunto set my hand.

ALEXANDER MURRAY. 

